Bard Bayrd Furnace 403293A - Manual (Page 39)

GAMA VENTING TABLES
FOR
CATEGORY I CENTRAL FURNACES
This booklet contains new venting tables designed specifically for use with Category I
central furnaces. These tables are unique, in that, industry wide venting tables now exist for
fan-assisted combustion system central furnaces. Venting tables for these types of appliances
are not contained in the National Fuel Gas Code (NFPA 54/ANSI Z223.1-1988).
All requirements contained in this booklet apply to both Category 1 drafthood equipped
central furnaces as well as fan-assisted combustion system central furnaces. At no time
should a venting system for a listed Category 11, 111, or iV central furnace be sized with these
tables. The National Fuel Gas Code (NFPA 54/ANSI Z223.1-1988) may also be used to size
venting systems for drafthood equipped central furnaces. However, at this time, the National
Fuel Gas Code does not include alternate sizing methods for fan-assisted combustion
systems. Therefore, until engineering data is developed to allow alternate sizing methods
for Category I fan-assisted central furnaces, the enclosed venting tables must be used
for fan-assisted combustion system central furnaces. These tables apply to venting single
appliances and common venting multiple appliances in both metal and masonry chimneys.
The new venting tables were developed by Battelle under contract (GRÎ-5088-245-1728) to
the Gas Research Institute (GRI). The computer program (VENT-11) developed by Battelle
Columbus generated the venting tables in this booklet and this procedure has been accepted
by the American Gas Association Laboratories as an appropriate engineering methodology for
determining venting requirements of Category I central furnaces,
For your information, the general venting requirements listed in this booklet are not
intended to be used as complete installation instructions and represent only a partial list of
venting considerations.
For venting applications that fall outside the parameters of the new venting tables, refer to
the furnace manufacturer's complete installation instructions, the specific vent manufacturer's
complete installation instructions, and state and local codes.
GRI DISCLAIMER
LEGAL NOTICE: This information is, in part, a result of work performed by Battelle under the
sponsorship of the Gas Research Institute (GRI). Neither GRI, members of GRI, nor any
person acting on behalf of either:
a. Makes any warranty or representation, express or implied, with respect to the accuracy,
completeness, or usefulness of this information, or that the use of any apparatus, method,
or process disclosed may not infringe privately owned rights; or
b. Assumes any liability with respect to the use of, or for damages resulting from the use of,
any information, apparatus, method, of process disclosed.
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